I agree with you about dogs - my dog clearly
has a memory, too. I tried to find something
useful for you by searching at www.google.com but
my words - memory, brain, human, dog (or animal)
gave me mostly just things that seemed to be news
notes where one news item would be about memory
and one about dogs, for example, or where the
'dog' was just an image in the mind of the human.
So I'll just tell you what I can:
Memory is still a very complicated
question. Once scientists trained worms and
then ground them up and fed them to untrained
worms. They thought the untrained worms learned
faster after eating the trained worms. But it
looks like that must have been bad research,
because I don't hear about it any more. Also,
they think our brains were like a hologram: if you
explore any part of your brain, your memories are
fuzzier, but they're not lost, so there's not a
single 'memory' region of the brain.
My text book has pictures of human and cat
brains that show how the higher brain - the
cerebrum - is much larger in human than cat and
has lots more ridges on it. It says birds and
mammals have big brains compared with lower
animals. (My cockatoo could learn and remember.)
I bought pig brains for a science lab from a
grocery store in Virginia one year, and they were
like white lumps of lard or butter, but with some
ridges. It was amazing how fatty they were, to
insulate all the electric signals that run from
one nerve cell to another. Good luck!
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